Infrared spectroelectrochemistry has been used to identify the products of the oxidation of methanol at a polycrystalline platinum electrode in absolute methanol solutions. A spectroelectrochemical cell, with potential control under ambient conditions and optical path under vacuum, provided spectra which were free of H2O and CO2 vapour absorptions. The SNIFTIRS potential step technique was used to obtain absorbance difference spectra which indicated that methyl formate was the major methanol oxidation product in acidic, neutral, and alkaline methanol solutions. CO2 and formate ion were also shown to be significant products under alkaline conditions. Spectra recorded with different infrared polarisations gave no evidence of adsorbed intermediates or adsorbed oxidation products.